Innovative Research Inc.

About: Innovative Research Inc. is a based out in . It is known for research contribution in the topics: Heat transfer & Raised floor. The organization has 29 authors who have published 61 publications receiving 1356 citations.

Numerical prediction of fluid flow and heat transfer in welding with a moving heat source

Abstract: An improved computational analysis is presented for the detailed prediction of heat transfer, phase change, and fluid flow during welding with a moving heat source The governing equations are formulated in a reference frame attached to the heat source A special feature in the formulation is that the primary unknown velocity is the convective velocity of the fluid with the motion of the heat source, resulting in additional source terms in the equations The equations are solved using a control-volume-based computational method The temperature and velocity fields and the time-temperature data are presented for two welding velocities to demonstrate the results using the new technique

Method and apparatus for sealing access

Abstract: An apparatus and a method for sealing a puncture in a tubular tissue structure or the wall of a body cavity are provided. The apparatus and method include a bioabsorbable member that is partially external to and partially internal to an introducer sheath before and during placement thereof.

Direct simulation of interfacial waves in a high-viscosity-ratio and axisymmetric core–annular flow

Abstract: A direct numerical simulation of spatially periodic wavy core flows is carried out under the assumption that the densities of the two fluids are identical and that the viscosity of the oil core is so large that it moves as a rigid solid which may nevertheless be deformed by pressure forces in the water. The waves which develop are asymmetric with steep slopes in the high-pressure region at the front face of the wave crest and shallower slopes at the low-pressure region at the lee side of the crest. The simulation gives excellent agreement with the experiments of Bai, Chen & Joseph (1992) on up flow in vertical core flow where axisymmetric bamboo waves are observed. We define a threshold Reynolds number and explore its utility; the pressure force of the water on the core relative to a fixed reference pressure is negative for Reynolds numbers below the threshold and is positive above. The wave length increases with the hold-up ratio when the Reynolds number is smaller than a second threshold and decreases for larger Reynolds numbers. We verify that very high pressures are generated at stagnation points on the wavefront. It is suggested that a positive pressure force is required to levitate the core off the wall when the densities are not matched and to centre the core when they are. A further conjecture is that the principal features which govern wavy core flows cannot be obtained from any theory in which inertia is neglected.

Use of Computational Fluid Dynamics for Calculating Flow Rates Through Perforated Tiles in Raised-Floor Data Centers

Abstract: This paper describes a computational fluid dynamics model for calculating airflow rates through perforated tiles in raised-floor data centers. The model is based on the assumption that the pressure in the space above the raised floor is uniform, which allows the calculation to be limited to the space below the raised floor. It uses a finite-volume method, the k-∊ turbulence model, and a multigrid method. The model is applied to a real-life data center. The calculated results for velocity and pressure distributions are discussed. The flow rates through the perforated tiles are shown to be in good agreement with the measured values.